Rear-sight bolt-action military arm.



T. C. JOHNSON.

REAR SIGHT BOLT ACTION MILITARY ARM.

APPUCATIQN- FILED FEB. 23, 19|7- 1,225,640. Patented May 8, SHEE 2 SHEETS T. C. JOHNSON.

REAR SlGH-T BOLT ACTION MILITARY ARM.

-APPLICATION FILED FEB. 23. I917.

1,225,640. Patented May 8,1917.

2 SHEETS-SHEET 2.

mvirnn srarns Parana o rrrono THOMAS C. JOHNSON, OF NEIV HAVEN, CONNECTICUT, ASSIGN ORITO' VVINGHESTER REPEATING ARMS (10., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

REAR-SIGHT BOLT-ACTION MILITARY ARM.

Specification of Letters Patent.

Patented May 8, 1917.

Application filed February 23, 1917. Serial No. 150,519.

To all whom it may concern:

Be it known that I, THOMAS C. JOHNSON, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Rear-Sight Bolt-Action Military Arms; and I do hereby declare the following, when taken in connection with the accompanying drawings andthe characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent. in

Figure 1 a broken view in right hand side elevation of the central portion of a boltaction shoulder arm embodying my invention. 7

Fig. :2- a view thereof in rear elevation ith the bolt-handle shown in its elevated position by broken lines.

Fig. 3 a detached view in side elevation of the receiver.

Fig. 4 a plan view thereof.

Fig. 5 a detached view in side elevation of a rear windage-sight adapted to be installed on the receiver of the arm.

My invention relates to an improvement in bolt-action military arms of the so called up-turn and pull-back'bolt type, the object being to permit the use, if desired, of sights adapted for very long range shooting.

With these ends in view, my invention consists in a boltaction military arm having certain details of construction as will be hereinafter described and pointed out in the claim.

' In carrying out my invention as herein shown, I form a transverse dovetail-rib 2 upon the forward end of the lower face of a rear, windage-sight base 3. A leaf-carrier 4 having parallel upstanding side flanges,

is pivotally connected at its forward end to the forward end of the said sight base upon which it has swinging bearing. A long sight-leaf 5 hung on a pivot 6 passing transversely through the rear ends of the flanges of the said swinging carrier is laterally adjusted for windage by means of a knurled finger-button on the projecting right hand end of an adjusting screw 8 which is mounted in the forward end of the said base 3 and connected with the said carrier so as to swing the same, and hence the said leaf.

For the tail-rib 2 of the sight-base 3, the receiver 9 is formed in its top with a corresponding transverse undercut groove 10 located directly to the rear of the rear end of an up wardly and laterally extending cartridgecharging and cartridge-ejecting opening 11 formed in the receiver. Between the said undercut groove 10 and the rear end of the opening 11, the receiver is formed with a pair of oppositely located, upwardly opening notches 12 for the reception of the cartridge-chargers employed for charging the gun.

As thus constructed and applied to the receiver, the rear end of the sight-base 3 overhangs the rear end thereof. For supporting the overhanging rear end of the receiver against bending or displacement in case the soldier should fall down with the gun or drop it, the rear end of the left hand side wall of the receiver is rearwardly extended to form a sight-base support 13 having its upper edge shaped to form a flat bearingsurfaee 1 for the left hand edge portion of the overhan ing rear end of the sight-base to rest upon. As shown, the outer face 15 of the said sight-base support 13 is convexed in form, while its inner face 16 is eoneaved. (Fig. 2). A clearance chamber 17 opening laterally to the right, and also rearwardly, is thus produced between of the said sight-base support 13. This chamber provides for the clearance of the inner end of the shank 18 of the handle 19 of the bolt 20, which moves back and forth for loading and unloading, and rotates for locking and unlocking. The said chamber 17 also provides clearance for the bolt-sleeve 21 and any other parts carried by the rear end of the bolt. The receiver is also formed at its rear end with a short integral tang 22.

By locating the dovetail-rib 2 at the for-- ward end of the lower face of the sight-base 3, by forming the receiver 9 with a corresponding transverse undercut groove 10, and by rearwardly extending the left hand wall of the receiver to form the integral sight base support 13, I am enabled to provide bolt-action military arms with rear-sights adapted for shooting at the greatest ranges, since by insuring the support of the overhanging rear end of a sight-base, I am enreception of thetransverse dovethe rear end of the receiver proper and the concaved inner wall and this I provide against, as already stated,

by means of my integral, rearwardly extending, sight-base support.

It is apparent that my invention is applicable to military arms of the type described, irrespective of their detailed construction, and irrespective of the detailed construction of their sights, my invention broadly comprehending the extension of the left hand side wall of the receiver of a boltaction arm to form a sight-base support so as to permit the employment of sight-leaves of the maximum length required for long range shooting, without endangering the down with bending of the sight or its being thrown out of line in case of accident to the arm.

I claim In a bolt-action military arm,'the combination with a receiver having an upwardly rear end of the receiver and to rest upon the a said rearwardly extended sight-base sup port.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

THOMAS C. JOHNSON.

Witnesses:

EUNIOE E. PECK, FRANK A. PAUL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

